Acid-proof bag for fertilizers.



NITED STATES WILSON WARING, OF SEWAREN, AND JOHN BRECKENRIDGE, OF WOODBRIDGE, NEW JERSEY.

ACID-PROOF BAG FOR FERTILIZERS.

SPECIFICATION forming part of Letters Patent No. 635,622, dated October 24, 1899.

Application filed February 27, 1899. Se1'ialN0.'707,061. (No specimens.)

T0 on whom, it may concern..-

Be it known that we, WILSON WARING, of Sewaren, and J OHN E. BRECKENRIDGE, of Woodbridge, county of Middlesex, New J ersey, citizens of the United States of America, have invented Acid-Proof. Bags for Fertilizers, 850., of which the following is a specification.

Jute and other bags of textile material which are used for the handling and shipment of acid contents, such as manufactured fertilizers, (acid phosphate and potash, for example,) are quickly corroded and destroyed by such contents. Many attempts have been made to render such bags acid-proof, as by the treating of the bags with paraffin or with caustic lime. The different means proposed or employed have had attendant objections of one kind or another. Thus the use of paraffinis objectionable, because its adds greatly to the danger of combustion. The use of caustic lime is objectionable, because it is highly injurious to the hands of those who have to handle the bags. We have discovered that such bags may be made acid-proof in a thoroughly reliable way at comparatively small expense and without any harmful effects on the bags themselves or on those who have to handle them.

In carrying out our invention we make use of a solution of an acetate to impregnate the bags. Because of its economy and efficiency we-prefer to use acetate of lime. Acetate of soda would serve the purpose; but at present at least it is more expensive than acetate of lime, and therefore we prefer the latter. We make a saturated solution of the acetate, and into this solution the bags are dipped or immersed, so that the fabric may become thoroughly impregnated with the solution. The bags may then be run through awringer and afterward are ready for use. l/Ve have found in practice that the bags thus treated are for practical purposes proof against the corroding action of the acid contents of the bag, and this We attribute to the fact that the free acids or acid compounds in the contents of the bags combine with the acetate to form acetic acid and compounds harmless to the bags. We have found that bags thus treated remain in good condition where untreated bags are quickly corroded and destroyed by similar contents. In other words, the bags treated in accordance with our invention are for practical purposes acid-proof and permit fertilizers or other acid contents to be shipped without danger of the bags being destroyed and at the same time without danger to those handling the bags. Furthermore, bags so treated are very much less liable to combustion than before treatment.

We claim as our invention 1. A new article of manufacture, a fertili zer or other bag, acid-proofed by an acetate.

2. As a new article of manufacture, a fertilizer or other bag, acid-proofed by acetate of lime.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

WILSON l/VARING. JOHN E. BRECKENRIDGE.

Witnesses:

CHAS. E. J ONES, H. VAN ORDEN PLATT. 

